*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ul,ol {
    list-style: none;
}
a{
    text-decoration: none;
}
.fl {
    float: left;
}
.fr {
    float: right;
}
.clearFix::before,
.clearFix::after {
    content: '';
    display: block;
    line-height: 0;
    height: 0;
    clear: both;
    visibility: hidden;
}
// 移动端可以省略
.clearFix {
    zoom: 1;
}